ANYLOAD NWE PRODUCT Split Donut for Landslide prevention
The disaster caused by landslides will be a great challenge to the construction of modern mountain engineering in the future. For example, the construction of roads between mountainous areas may create a hidden danger of landslides. Engineers have developed anchoring systems to prevent this from happening, but the persistence of geological changes makes monitoring the anchoring system a necessary means of enhancing safety.
Aerial view of landslide that buried Colonia Las Colinas.
ANYLOAD approached the project through a long-term customer to develop a monitoring system on top of an already installed anchoring system. Especially on a steep hillside, if vegetation has been removed and loose mudstone structures seriously threaten the lives and property of people downstream in this area, monitoring systems such as strain-gauge sensors installed on anchoring systems become critical and urgent.
ANYLOAD's team of sensor design engineers includes: Tryke Hu, who specializes in finite element analysis; George Jiang - has many years of experience in force sensor technology and testing; Alex To - Former President of the Hong Kong Institution of Mechanical Engineers and member of the Institution of Mechanical Engineers; And Gary Y Gui - 24 years of sensor design and manufacturing experience. The team, backed by hundreds of successful sensor design experiences, was determined to find a solution for this customer. They have just received certification for their stainless steel fully sealed single point sensor OIML C9, Y=18000, which is currently certified by NMI Certin in the Netherlands as the world's highest precision analog sensor. Now, using the experience and technology they had at their disposal, they boldly discussed a design concept that fully met the harsh conditions of the customer's site - the anchoring system could not be removed from the hillside, and the test system had to be installed on the already installed anchoring system. After rigorous design analysis and rigorous testing, the team developed an innovative design: the Split Donut sensor
The installation of this device does not require the removal of the anchor pile already installed, but the sensor is directly attached to the anchor pile in a limited space to detect its tightening force. How to effectively monitor the chaotic tightening stress changes, while maintaining accuracy and repeatability is a huge challenge. We overcome these chaotic stresses by compensating each other by evenly covering the sensor's sensitive grid (strain gauge), so that the system can obtain accurate and useful data. Several extremely thin stainless steel covers are used to seal the sensor with precise laser welding technology, so that when the sensor is deformed by pressure, the welded stainless steel covers do not have a disturbing effect on the stress of the elastic body.
The end result was that the customer required a full scale accuracy error of 5%, but the Anyload design team exceeded the customer's expectations, with the Split Donut sensor achieving a linearity error of 4.4% and repeatability of 1.1%.
"For more than 20 years,Anyload has been at the forefront of professional design and manufacture of various types of sensors, manufacturing sensors from a few grams to hundreds of tons, and strive to meet various needs. The project helps engineers prevent landslides during modern construction by monitoring ever-changing and highly unstable underground pressure data. We are proud of this successful design as it will make a significant contribution to saving lives and property in areas prone to landslides." ——Gary Gui
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